Combination marker gauge



Oct. 4,1927. 1 1,644,403 v W. R. SCHLAGE COMBINATION MARKER GAUGE Filedopt. 24. 1925 IN V EN TOR.

Patented 0st. 4, 1927.

same. a very simple and quick operationancl as the. holes must assume anaccurate and predeterwi e ess-- ssfitaeaz 01* SAN ae i i c icemro m s-cor/immersion na maoaeen ap lication mew-nearer 24,4925. Serial-1N0.wages,

This inventionrelates to a .con ibiiiation marker iandgauge.

The object of theapresent invention; is? to generally improveandxsimplify -::the construction and operation of the devices of-thecharacter described and .to :provide a-. com-1 bination marker:andgaugew'vhereby -;dri'lled orboredxholes requiring a predetermmed1position with relation to each other may'be ac- 'curately; unankedL'before drilling toizprovide a gauge whereby the 7 hole may be gaugedor measured idurring;.or.iafter; the completion of the drillingoperation and, furthermore, to provide a gauge whereby the drilling orboring tool, for instance, an expansion bit, may

be adjusted or properly set beforethe drilling operation. r

One form which the invention may assume is exemplified in theaccompanying specifications and drawing in which- 7 Figure 1 is a Figure2 is a perspective view of the combination marker and gauge, Figure 3 isa cross section of a portion of a door showing'the large hole partiallybored and the head of the plate inserted to determine if the bit iscutting-to proper size.

When fitting a certain type of lock to doors, it is only necessary tobore two holes mined positionwith relation to each other in order thatthe latch mechanism may be properly connected to the main lock,'it isevident that considerable care must be taken in measuring, layingbfl'and marking the holes before boring the same and care must also be takenthat the expansion bit is properly adjusted as a slightly" undersizedhole 7 will prevent insertion of the lock'mechanism and latch, while anoversized hole will cause undue play and a poor fit.

The combination marker" and gauge iform- I perspective view of a portionof the door showing the door bored and ready for the reception of thedoor lock,

.thesubjectsmatten.ofqthe presentiapplica;

,tion-eliminatesithese troublesas itifirstxifall v permits the; work ;to1b e', accuratelyandiqlaiek ly i laid; iofi and marked. 'r'Secondly,:-it per- .m1ts .accurate "zadj ustme'nt of;v the extension bit, and;third, ,permits .measuring-mrngaug ing 0f"tl18ilIOl8Sid11IIiIIg oraafterigoonipletion of*the boringoperation. .v

T he combination V-marker :andkg-a uge :ziS' preferably constnucted. :of:thin'? sheet smetal whiclrvsmay ibei blanked front land iiformed'ibymeans of r-d ies. Elie splate zconsistsoeflea rounded or circular headmember A; a reduced extension B andafoot member C;

The head member A is centrally perforated as at 2 to form a markeropening. and v I i the foot member is notched as at 3 to form a secondmarker opening. V

It may furthermore be stated that the foot member is bent at rightanglesto the main plate sectionconsisting of the memb.ers"A and B, thisbeing necessary as the holes to be marked are disposed at right angles iwith relation to eachother. r

In actual operation"D indicates a portion of a door and 'E and F theholes drilled or bored therein. Thehole E extends'through the door fromface .to face if and is fairly large in diameter, as previouslystated,as it receives the main look me'cha-* nism. The hole F7? isfairly sma'llin diameter and is drilled through the edge of a the doorto a point where it intersectsthe main hole E.

WVhen the carpenter, or vother mechanic, who is fitting the locks to thedoors, desires to lay OE and markthe holesprior to boring same, hemerely applies the combination marker and gauge to the door in'theposition indicated by the dotted lines in Figure 1.

By inserting'a pencil or like iniplementinj the perforation, 2, he marksthe center of.

the large hole to be boredand byinserting the pencil in the V notch hedetermines the position of the smaller hole F, that is, he

places a square on the edge of the door and draws a line through the Vnotch pencil mark, as indicated at 4, and then determines a central.point on this'linewhich is then marked for vthe drilling of the smallhole. If he employs an extension bit, he places the center of the bit inthe perforation. 2 of the" plate and then adjusts the extension-bituntil 1 the cutting edge aligns with the outer pe- I'IO riphery of thecircular;memberA; With the bit adjusted, it isonly necessary to drill Vthe large opening E. In drilling the first v opening, it isadv-isable toremove the bit before. the .hole iscompletedsothat the member FA of theplate may be inserted as shown in Figure 3. The headthus' serves as agauge and it is therefore leasy to determine t wheth'er the hole 'cutbythe extension bit is i snug or "large. If theadjustment proves .acacurate, it is only necessary to complete the T :be desired. After all ofthe large' holes holeiandto bore as many other doorsas may H havebeendril1ed,=he.can readjusttheexpan- '1 sion bit to the small 11016 fFor: install a {standard bit if desired, The plate serves 7 p 15,

the iunction ofv a gaugeand also serves the function of laying out andmarking the door; This, simplifieslthe work for the me- 1 chanic',reduces the time required andinsures' 7 more accurate and uniform,measurements.

'- 1While certain features of the present invention are more or lessspecifically de scribed and illustrated, I Wish itunderstood thatchanges and variations maybe resorted to Within the scope of theappended claims. Having thus described my invention, What I claim anddesire to secure by Letters Patprising a plate,having arounded head mem-2. A combination markerand'gauge com- I ber on one end and a-footextension bent at said rounded head member havinga marker openingformedwcentrally thereof fand' said foot extension havinga marker notchformed in one edge. I

' WALTER R. soHLAGn right angles thereto on the opposite end"; V

